Interdental brush



FIG. 1 is a perspective view of an interdental brush at a first position;

FIG. 2 is a perspective view of the design of FIG. 1 at a second position;

FIG. 3 is a first side view of the design of FIG. 1;

FIG. 4 is a second side view of the design of FIG. 1;

FIG. 5 is a third side view of the design of FIG. 1;

FIG. 6 is a fourth side view of the design of FIG. 1;

FIG. 7 is a bottom view of the design of FIG. 1; and,

FIG. 8 is a top view of the design of FIG. 1.

The broken lines shown in the drawings represent portions of the interdental brush that form no part of the claimed design. 

CLAIM The ornamental design for an interdental brush, as shown and described. 